First of all you have to know what is Bhagavad gita?B.G is not a ordinary mundane scholar words.It is the word of Supreme Lord Personality Godhead,KRISHNA.5000 years ego KRSNA reestablished the transcedental knowledge through His devotee as well as friend Arjuna.HE choose Arjuna only for this relationship.Arjuna understood that science knowledge because he has a lot of devotion to Lord Krishna.Only this is the keyword i.e lot of devotion to Lord to understand properly this knowledge.
Also you can know it properly if you use to flow in your life the instructions given by Supreme Lord Krishna.The Bhagavad gita is the manual of human society.
There are so many auother who wrote the perport of B.G.But among them all most all of them misinterperte actual Lord word .Only ‘ Bhagavad gita As It is’ compiled by A.c Vaktivedanta prabhupada is right one.
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